Arc-lamp.



E. s. PoRTER. ARC LAMP.

APPLICATION FILED FEB. 3,1917.

.1",272-,31 3, Patented July 9, 1918..

2 SHEETS-SHEET l.

HIEIIIIL y IIIJIIIH Y Arm/MHS E. S. PORTER.

ARC LAMP.

APPLICATION FILED FEB. 3. 1917.

Patented Jly 9, 1918.

2 SHEETS-SHEET 2.

/VVE/VTOR E Parier BY @M A TTORNEYS EDWIN STANTON PORTER, OF NEW YORK,N.

ARC-LAMP.

Specification of Letters Patent.

Patented July 9, 191s.

Application filed February 3, 1917. Serial N o. 146,355.

To all whom t may concern:

Be it known that I, EDWIN S. PORTER, a citizen of the United States, anda resident of New York, in the county of'New York and State of New York,have invented certain new and useful Improvements in Arc- Lamps, ofwhich the following is a specification.

My invention relates to electric arc lamps used in conjunction withprojectors for moving pictures and the like, and it has referenceparticularly to the carbon holding and feeding means, which present aplurality of rolling supports to a carbon.

Another object is to provide means for rapid manipulation of al carbonin the holder', said means automatically clamping the carbon in ayielding manner and automatically accommodating themselves to carbons ofdifferent diameters and to surface inequalities on the carbon, saidmeans also automatically changing the speed of movement of carbons ofdifferent diameters..

Another object is to provide manually controlled means for changing theaXial angularity of a carbon with respect to its support, vand whichmeans also automatically vary, when operated', the' speed of movement ofa carbon of a given diameter supplemental to the above mentioned speedvarying means for carbons of different diameters. l

Another object isv to provide means for applying the feeding power ateither of said supports and for permitting independent longitudinalmovement or adjustment of carbon at another of said supports during theoperation of Said feeding support.

vAnother object is to operatively connect the carbon feeding rollingsupports of two carbon holders whereby two carbons may be simultaneouslyfed toward each other, said connecting means also enabling an operatorto change the relative angularity of the two carbons at will.

And further objects are to provide such devices in a simple andpractical form,- to construct the same of few parts not likely to getout of order and, in the hands of a careless or unskilled operator, willbe maintained' foolproof.

My invention is fully described in the following speciication, ofwhichthe accompanying drawings form a part, in which like charactersrefer to like parts in each of the views, and in which v Figure l is aside view of one embodiment ,of the invention, partly in section to showdetails with the parts in normal positions;

Fig. 2 is a-'longitudinal section taken on the line 2-2 of Fig. l;

Fig. 3 is a section taken on the line 3 3 of Fig. 1;

Fig. 4 is a section taken on theline 4 4 of Fig. 1, showing my deviceinyduplicate for two carbons on a single axis; and

Fig. 5 is a substantially similar section, showing the carbons inangular relationshi and showing the devices geared together forsimultaneous operation and for changing the angularity of the carbons inan epicyclic manner.

Referring to the drawings, 6 shows a frame formed of side plates 7 and 8joined by cross members 9 to constitute a unit, said frame being mountedin any desired manner as by a bar 10 adjustably locked thereto.

Rotatably mounted between t-he plates 7 and 8 are three peripherallygrooved rollers l1, 12 and 13, the spindles of which are parallel andarranged in triangular relationship. The roller 13 consists of twotruncated cones in fixed and opposed relationship with a cylindricalmember joining .the same to form the groove, designated 13, 13b and 13,the spindle of said roller being extended and provided with a knob 13dwhereby said roller mayV be manually rotated.

The spindle carries a spur gear 13e keyed thereto. It will be noted thatthe roller is central with the plates 7 and8 and is prevented fromlongitudinal displacement therebetween. y

The rollers 12 and 13 constitute a pair supporting the same side of acarbon 1i with the roller 11 bearing against the opposite side of saidcarbon, the spindles of the rollers 12 and 13 being spaced from thespindle 0f the roller 11 to permit the introduction of. carbons ofdifferent diameters within certain limits.

The roller 12 differs from the roller 13 in that the truncated cones 12aand 12b,herein afterreferred to as cheeks-are unconnected,

the former being pinned a sleeve 12d slidable. on the spindle thoughprevented from independent rotary movement because of a pin`12e and slot12f, Fig. 1. f

The spindle 12 is provided with a knob 12lll and is screw threaded for adistance adjacent to said knob, a nut 12i being in threaded engagementwith said spindle and provided with al recessed inner end inclosing aflange 12k on the sleeve 12d whereby, when the said nut is rotated toapproach the knob 12h, the sleeve 12d and cheek 12b will move away fromthe cheek 12ZL and Widen the gap therebetween and if the nut is rotatedreversely the cheeks approach each other to narrow the groovetherebetween.

A spur gear 12m with a Acollar 12 is coupled to revolve with the sleeveby a key 12, which allows the sleeve to slide in the gear, thus thespindle 12u, sleeve 12d and roller 12 can be moved longitudinally ineither direction until the adjacent cheek and side plate of the framecontact, thus providing a floating roller 12 with respect to the fixedroller 13.

Enmeshed with the gear '13e and with the gear 12m is an idle gear 15which insures simultaneous and similar rotation of the rollers 12 and 13regardless of which knob is rotated, and it will be noted that, when thegroove in the roller-,12 is widened or narrowed the corresponding end ofthe carbon is moved toward or from the spindle 12c and thus the axialangularity of the carbon is changed with respect to the frame 6.

The roller 11 is also provided with relatively movable cheeks 11a and11b, the former being integral with or secured to a sleeve 11c freelyslidable in the frame plate 7 and the latter is similarly mounted ona'sleeve 11d slidable in the frame plate 8.

A spindle 11e is slidably'arranged within said sleeves and provided withpins 11" arranged in suitable grooves in the said sleeves to compelrotary movement of said sleeves with said spindle when the knob 11h ofthe said spindle is rotated, either manually or by any desired powerdriven means, not shown.

The spindle 11e is provided with a nut 11i on its end opposite the knob11h and with an adjustable locked collar 11k and a finger plate 11'between which a coil spring 1111 is arranged the tendency of which is tomove the spindle and cheek 11b to the left of Fig. 2 and the sleeve 11cand cheek 11a to the right to carry'said cheeks into contact with eachother to narrow the groove therebetween but, if the finger plate 11m ismanually drawn toward the knob 11, said cheeks are correspondingly movedapart to widen the groove therebetween and thus permit the introduc tionof the carbon 14 and, after the carbon is introduced, release of thesaid finger plate will again tend to force the cheeks toward eachotherto narrow the groove therebewith the' gear 16 tween and thus cause thesaid cheeks to bear on the carbon and to force the same into the groovesof the rollers 12 and 13.

While the rollers 12 and 11 are capable of sliding movement in the framewhen no carbon is in place, such movement is prevent.- ed by the fixedroller 13 when a carbon is introduced between the rollers. To attempt toslide either of the rollers 12 or 11 in the frame would cause the carbonto slide up on the respective conical surfaces of the cheeks resisted bythe spring 11n and, upon cessation of such attempt, said spring wouldimmediately causethe rollers 12 and 11 to center themselves in theframe.

As shown in Fig. 2, 1 may provide insulation on the cheeks of saidrollers and I prefer to serrate, score, knurl, or otherwise roughen thecheeks. 12a and 12b to insure a positive grip on the carbon, althoughthis rcould also bel done on the cheeks of the rollers 11 and 13,

Power driven means may be operatively4 connected with any one of therollers to feed the carbon forwardly or the respective knob vcould bemanually rotated to accomplish said forward carbon feed, but I prefer tohave the roller 11 the driving or forward carbon feeding roller, and theother rollers may then be used to adjust thelcarbon longitudinally. L

In Fig. 5 I have shown the rollers 11 of two holders geared together bymeans of an idle gear 16 whereby two carbons 14 and 17 aresimultaneously fed forwardly though individually `adjustablelongitudinally in the manner hereinbefore described and, in view of thissuny and planet gear arrangement, either or both of the holder framescan be moved in an'iepicyclic manner about the axis of the gear 16 tocorrespondingly vary the relative angularity of the two carbons, byadjusting the holder by means of the arm 10, in other words, letting thepinion enmesh of a holder to run on the gear, while the pinion of theother holder remains stationary.

lt will thus be seen that a carbon can be installed or introduced into aholder, that the holding means will automatically accommodate themselvesto carbons of dierent diameters within limits and to surfaceinequalities, that a carbon may be adjusted lon. gitudinally withoutregard for the carbon feeding means, that a carbon may be deflected fromits normal path throughthe frame by adjustment of the cheeks of ,theroller 12, that the speed of carbon feedis eater or less as its diameteris greater 'or less for the reason that the greater its diameter the'farther up the cheeks 'of the rollers it will bear and thus be fartherremoved from the axes of the rollers, and that the roller 12, upon cheekadjustment, also controls the speed of carbon feed as saidl'carbon.

moves inwardly or outwardly of the axis of said roller and, thus,outwardly or inwardly of the axis of the roller 11.

My device is very simple though eficient and saves much time'in removingold and in installing new carbons and, with all of the foregoing noveladvantages, it possesses all the advantages of devices of this kind nowknown to m Having fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

l. In an electric arc lamp, a carbon holder and feed, comprising aframe, a pair of peripherally grooved rollers on one side of the carbon,a peripherally grooved roller on the opposite side of the carbon, meansfor varying the width of one of said rollers, and means for actuatingone of said rollers to feed said carbon.

2. In lan electric arc lamp, a carbon holder and feed, comprising aframe, a pair of peripherally grooved rollers on one side of the carbon,a peripherally grooved roller on the opposite side of the carbon,yieldingly resisted means for widening the groove in one "of saidrollers to admita carbon between said rollers, and means for actuatingone of said rollers to feed. said carbon.

, 3. In an electric are lamp, a carbon holder and feed, comprising aframe, a pair of peripherally grooved rollers on one Vside of thecarbon, a'peripherally grooved roller on the Aopposite side of saidcarbon, means for one of said rollers to feed said carbon and forautomatically varying the speed of carbon feed in accordance with thediameter of said carbon.

4. In an electric are lamp, a carbon holder and feed, comprising aframe, a pair of peripherallyv grooved rollers on one side of a carbon,a peripherally grooved roller on the opposite side of the carbon andyieldingly resisted means for widening' the groove in said last namedroller to cause a carbon to approach the axis of said roller and thusdecrease the speed of feed thereof when of relatively great diameter,and for narrowing said groove to cause a carbon to recede from the axisof said roller to increase the speed of feed thereof when of relativelysmall diameter.

5. In an electric are lamp, a carbon-holder and feed, comprising aflame, a pair of lperipherally groovedrollers on one side f a carbon, aperipherally grooved roller on the opposite side of said carbon, meansfor actuating one of said rollers to feed said carbon, andl means foradjusting the width of one of said pair of rollers to swing one end ofthe carbon laterally. f

6. In an electric arc lamp, a carbon holder and feed, comprising aframe, a pair of eripherally grooved rollers on one side of a carbon, aperipherally grooved roller on the opposite side of the carbon, meansfor actuating one of said rollers toA feed said carbon, means foradjusting the width of one of said pair of rollers to swing one end ofthe carbon laterally, and means on said roller disposed on the oppositeside of the carbon for maintaining pressure on said carbon in thelateral movement thereof.

7. In an electric arc lamp, a carbon holder and feed, comprising aframe, a pair of peripherally grooved rollers on one side 0f a carbon, aperipherally grooved roller on the opposite side of the carbon, meansfor actuating one of said rollers to feed said carbon,

means for adjusting the width of one of.

said pair of rollers to vary the speed of carbon feed, and means on saidroller disposed on the opposite side of the carbon for maintainingpressure on the carbon in any adjustment of said adjustable widthgroove.

8. In an electric arc lamp, a carbon holder and feed, comprising aframe, a pair of periplierally grooved rollers on one side of thecarbon, a train of gears connecting said rollers, a peripherally groovedroller on the opposite side of the carbon, and means for actuating oneof said rollers to feed the carbon. the axes of all of said rollersbeing parallel and arranged in triangular relationship.

9. In an electric arc lamp, a carbon holder and feed, comprising aframe, a peripherally grooved roller on one side of the car# bon. twosleeves movable in opposite sides sleeve jointly forming a peripherallygrooved roller on the side of the carbon occupied by said firstnamed-roller, a spindle in said sleeves secured to one of said sleeves.

means for preventing spindle rotation in the other of said sleeves, anut in screw threaded engagement with said spindle and in rotaryconnection with the other of said sleeves for adjusting said spindlelongitudinally of said last named sleeve, a peripherally grooved rolleron the opposite side of said carbon, and means for actuating one of saidrollers to feed the carbon.

.10. In an electric arc lamp, a carbon lholder and feed, comprising aframe, a pair of peripherally grooved rollers on one side 0f. thecarbon, a peripherally grooved roller on the opposite side of thecarbon, manual mea-ns for increasing the width of the groove in saidlast named roller, and a spring Vfor narrowing -said groove when saidmanual means are released, to grip the carbon., and means for actuatingone of said rollers to feed the carbon.

11. In an electric arc lam a carbon holder and feed, comprising a rame,apair of peripherally grooved rollers on one side of the carbon, asleeve movably., mounted in each side of said frame having beveled 100of said frame, a beveled cheek on each j i cheeks jointly forming a.peripherally grooved roller on the opposite side of the carbon, aspindle longitudinally movable in said sleeves, means for preventingrotation of said spindle in said sleeves, a spring bearing on one ofsaid sleeves and on said spindle tending to hold said cheeks togetheryieldingly, and means for actuating one of to actuate the samesimultaneously andJ to permit adjustment of the two carbons relative toone another.

13. In an electric arc lamp, a pair of carbon holding and feeding means,each presenting a plurality of rolling supports for a carbon, anadjustable support for each holding and feeding means, a pinionassociated witha rolling support of each of the carbon holding andfeeding means, and

a gear in mesh with said pinions whereby motion may be transmittedthrough said gear to said pinions simultaneously the ad justablesupports permitting the movement of the pinion of each holding andfeeding means on the gear without the other pinion -being moved.

14. In an electric are lamp, a carbon holderand feed, comprising aframe, a plurality of peripherally grooved rollers adapted to receive acarbon therebetween, means for varying the width of one of said rollers,and means for rotating one of said rollers to feed a carbontherebetween.

15. In a carbon holder and feeder for an electric are lamp, a groovedroller having moving cheeks whereby 'the width of the groove may bevaried, and means for moving said cheeks. l

. 16. In a carbon holder and feeder for an electric arc lamp, a groovedroller having moving cheeks whereby the width of the groove may bevaried` and yielding means normally tending to 'draw said cheekstogether.

17. Inv a carbon holder and feeder for electric are lamps, a groovedrollerformed of two separate cheeks each having a sleeve, a spindleengaging said sleeves sothat the cheeks are constrained to revolve onsaid spindle but are free to slide thereon, said spindle having a headagainst which one of the sleeves abuts, an adjustable collar on saidspindle, a spring abutting with one end against said collar and with theother end against the other sleeve, and means for turning said spindle.

18. In` a carbon holder and feeder for electric arc lamps, a groovedroller formed of two separate cheeks each having a sleeve, a spindlevengaging said sleeves so that the same are free to slide on the spindlebut are constrained to revolve therewith, a head at one end of saidspindlegagainst which one of the sleeves is adapted to abut, a collaradjustably mounted near the other-end of the spindle, a spring on saidspindle abutting with oneend against the collar and with the otheragainst the sleeve of the other cheek, said sleeve having means wherebythe same can be manipulatedto draw the two cheeks apart` and means forturning said spindle..

19. In a carbon holder and feeder for electric arc lamps, a groovedroller formed of two' separate cheeks each having a sleeve, the twosleeves being directed in opposite directions, a spindle engaging saidsleeves so that the same are free to slide on the spindle but areconstrained to revolve with the spindle, a head on one end of thespindle against which one of the sleeves of one of the cheeks is adaptedto abut, a linger plate in proximity of the end of the sleeve of theother cheek, a collar adjustably mounted on said spindle in proximity ofsaid finger plate, a spring on said spindle between said collar andfinger plate, and means for turning said spindle.

EDWIN STANTON PORTER.

